Partially premixed combustion based on different injection strategies in a light-duty diesel engine
Partially premixed combustion based on different injection strategies in a light-duty diesel engine
复制标题
轻型柴油机基于不同喷射策略的部分预混燃烧
DOI：
10.1016/j.energy.2015.12.052
复制
发表时间：
2016-02
期刊：
影响因子：
9
通讯作者：
Bao Zufeng
中科院分区：
文献类型：
--
作者：
Qiu Liang;Cheng Xiaobei;Liu Bei;Dong Shijun;Bao Zufeng
部分预混燃烧（PPC）的性能在很大程度上依赖于燃油和缸内气体之间的适当混合。在一台四缸轻型柴油机上，采用单次喷射和多次喷射两种喷射策略实现了PPC，并从放热率、燃烧相位、排放和热效率等方面进行了评价。单次喷射初期，燃烧过程以预混燃烧为主，扩散燃烧过程较短。它既具有预混燃烧的特点，又具有低温燃烧的特点。但是，在高负荷时，扩散燃烧的比例增加。采用后喷模式，NOx和烟度排放同时降低。对于多次喷射策略，气缸压力和峰值压力上升率较低。随着先导-主要间隔的增加，由于充分的预混合时间，混合物更加均匀。然而，在双引燃喷射模式中，扩散燃烧起主导作用。在低负荷工况下，预喷射方式比晚喷射方式的制动燃油消耗率和制动热效率有较大提高。与单次预喷射方式相比，双次预喷射方式的NOx排放量显著降低，而烟度和CO排放量增加。
The performance of partially premixed combustion (PPC) relies heavily on the proper mixing between the fuel and the in–cylinder gas. In this paper, two injection strategies, including single and multiple injection, were investigated to achieve PPC in a four-cylinder light-duty diesel engine, and were evaluated in terms of heat release rate, combustion phase, emissions and thermal efficiencies. The combustion process is dominated by premixed combustion and the diffusion combustion process is quite short at the early single injection mode. It shows the characteristics of both premixed combustion and low temperature combustion. However, the ratio of diffusion combustion increases at high load. NOxand smoke emissions reduce at the same time with late injection mode. For the multiple injection strategy, the cylinder pressure and peak pressure rise rate is lower. As the pilot-main interval increases, the mixture is more homogeneous due to sufficient premixing time. However, diffusion combustion plays the dominant role in the double pilot injection mode. The BSFC (brake specific fuel consumption) and brake thermal efficiency are considerably improved with pilot injection mode at low load condition, compared with late injection mode. The NOxdecreases dramatically in double pilot injection PPC, while the smoke and CO increase, compared with single early injection mode.
登录
查看更多内容
DOI：
10.4271/2008-01-0642
发表时间：
2008-04
期刊：
--
影响因子：
--
作者：
J. Benajes;S. Molina;R. Novella;S. Arthozoul
通讯作者：
J. Benajes;S. Molina;R. Novella;S. Arthozoul
DOI：
10.4271/2004-01-1907
发表时间：
2004-06
期刊：
SAE transactions
影响因子：
--
作者：
K. Okude;Kazutoshi Mori;Shiroh Shiino;Takeshi Moriya
通讯作者：
K. Okude;Kazutoshi Mori;Shiroh Shiino;Takeshi Moriya
影响因子：
9
作者：
Stefano Iannuzzi;G. Valentino
通讯作者：
Stefano Iannuzzi;G. Valentino
DOI：
10.4271/2004-01-1843
发表时间：
2004-06
期刊：
SAE transactions
影响因子：
--
作者：
C. Mueller;Glen C. Martin;T. E. Briggs;K. Duffy
通讯作者：
C. Mueller;Glen C. Martin;T. E. Briggs;K. Duffy
DOI：
10.4271/2008-01-0639
发表时间：
2008-04
期刊：
--
影响因子：
--
作者：
Hanho Yun;M. Sellnau;N. Milovanović;Stefan Zuelch
通讯作者：
Hanho Yun;M. Sellnau;N. Milovanović;Stefan Zuelch